Re: Changes in GC and in pure space (was: [Emacs-diffs] master 5d4dd55: Fix lifetime error in previous patch)

[Paul Eggert]

Pip Cet wrote:

> Here are things I would consider urgent enough to warrant looking at
> for Emacs 27:
> - remove code like we have in `Ffset' to detect GC bugs that
> presumably have been fixed by now

Are you talking about just the code introduced in commit 
2014-04-03T00:18:08Z!address@hidden 
(01ae0fbf30b74e2490144fceabbf5bc5d96f1ba7), or is some other code involved? I'll 
CC this to dancol to see if he has thoughts.

> - make_fixnum called for numbers outside the fixnum range

I installed a patch to master just now to do that.

> - various places that should detect circular lists but don't (lread.c
> reading hash tables, for example)

Can you give an example of that problem?

> - doubly-evaluated macro arguments (the one I can think of offhand is
> DUMP_SET_REFERRER, which is harmless, but others might not be)

Do you mean evaluated as in macro expansion, or evaluated as in execution at 
runtime? If the latter, I don't get the problem there. Many other macros assume 
that arguments are side effect free, and some of these cannot be turned into 
inline functions easily.

> - since we appear to be stuck with lazy rehashing for now, the various
> bugs this causes (I mentioned Fclrhash above)

Sorry, what's the Fclrhash bug?